Back to results
US 2007/0163465 A1Published application
Metal salts of hydrolyzed olefin/maleic anhydride copolymers and their use as wood preservatives
AssigneeE.I. duPont de Nemours and Company
InventorsAlbert Anderson, John Feaster, Damini Patel, Mark Scialdone
Life of this patent
Estimating the term…
Abstract
Complexes of copper and/or zinc with hydrolyzed olefin/maleic anhydride copolymers were solubilized in ammoniacal solution providing preservative solutions that fully penetrate wood. With loss of the ammonia from the wood, the complexes were stably retained in the wood providing a long lasting preservative.
Claims20
An aqueous composition comprising in admixture (a) a complex comprising (i) copper ions, zinc ions or a mixture thereof, and (ii) a hydrolyzed olefin/maleic anhydride copolymer of at least about 2,000 molecular weight;
- and (b) ammonia and/or ethanolamine;
- wherein component (b) is present in an amount sufficient to solubilize the complex.
Dependencies are inferred from the claim text.